In this photo taken on Tuesday, Feb. 14, 2017, Lynne Tingle administers a cannabis based medicinal treatment to a dog at the Milo Foundation pet adoption center in Richmond, Calif. As more states legalize marijuana for humans, more pet owners are giving their furry companions cannabis-based extracts, ointments and edibles marketed to treat everything from arthritis and anxiety to seizures and cancer. (AP Photo/Ben Margot)